Abstract
One powerful approach to studying gene function is to analyze the phenotype of an organism carrying a mutant allele of a gene of interest. In order to use this experimental approach, one must have the ability to easily isolate individual organisms carrying desired mutations. A widely used method for accomplishing this task in plants and other organisms is a procedure called TILLING. A traditional TILLING project has at its foundation an ordered mutant population produced by treating seeds with a chemical mutagen. From this mutagenized seed, thousands of individual mutant lines are produced, and corresponding DNA samples are collected. For several plant species, publicly accessible screening facilities have been established that perform mutant screens on a gene-by-gene basis in response to customer requests using PCR and heteroduplex detection methods.
The iTILLING method described in this chapter represents an individualized version of the TILLING process. Performing a traditional TILLING experiment requires a large investment in time and resources to establish the well-ordered mutant population. By contrast, iTILLING is a low-investment alternative that provides the individual research lab with a practical solution to mutation screening. The main difference between the two approaches is that iTILLING is not based on the establishment of a durable, organized mutant population. Instead, a system for growing Arabidopsis seedlings in 96-well plates is used to produce an ephemeral mutant population for screening. Because the intention is not to develop a long-term resource, a considerable savings in time and money is realized when using iTILLING as compared to traditional TILLING. iTILLING is not intended to serve as a replacement to traditional TILLING. Rather, iTILLING provides a strategy by which custom mutagenesis screens can be performed by individual labs using unique genetic backgrounds that are of specific interest to that research group.
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References
McCallum CM et al (2000) Targeted screening for induced mutations. Nat Biotechnol 18:455–457
Greene EA et al (2003) Spectrum of chemically induced mutations from a large-scale reverse-genetic screen in Arabidopsis. Genetics 164:731–740
Colbert T et al (2001) High-throughput screening for induced point mutations. Plant Physiol 126:480–484
Gady ALF et al (2009) Implementation of two high through-put techniques in a novel application: detecting point mutations in large EMS mutated plant populations. Plant Methods 5:13
Tsai H et al (2011) Discovery of rare mutations in populations: TILLING by sequencing. Plant Physiol 156:1257–1268
Botticella E et al (2011) High resolution melting analysis for the detection of EMS induced mutations in wheat SbeIIa genes. BMC Plant Biol 11:156
Bush SM, Krysan PJ (2010) iTILLING: a personalized approach to the identification of mutations in specialized genetic backgrounds. Plant Physiol 154:25–35
Weigel D, Glazebrook J (2006) Protocol: EMS mutagenesis of Arabidopsis seed. Cold Spring Harb Protoc. doi: 10.1101/ pdb.prot4621
Krysan PJ (2004) Ice-cap: a high-throughput method for capturing plant tissue samples for genotype analysis. Plant Physiol 135:1162–1169
Su S et al (2011) Ice-Cap: a method for growing Arabidopsis and tomato plants in 96-well plates for high-throughput genotyping. J Vis Exp 57:e3280. doi:10.3791/3280
Clark KA, Krysan PJ (2007) Protocol: an improved high-throughput method for generating tissue samples in 96-well format for plant genotyping (Ice-Cap 2.0). Plant Methods 3:8
Kermekchiev MB, Tzekov A, Barnes WM (2003) Cold-sensitive mutants of Taq DNA polymerase provide a hot start for PCR. Nucleic Acids Res 31:6139–6147
Montgomery J et al (2007) Simultaneous mutation scanning and genotyping by high-resolution DNA melting analysis. Nat Protoc 2:59–66
Meyer M et al (2008) From micrograms to picograms: quantitative PCR reduces the material demands of high-throughput sequencing. Nucleic Acids Res 36:e5
Parameswaran P et al (2007) A pyrosequencing-tailored nucleotide barcode design unveils opportunities for large-scale sample multiplexing. Nuclei Acids Res 35:e130
Reed GH, Wittwer CT (2004) Sensitivity and specificity of single-nucleotide polymorphism scanning by high-resolution melting analysis. Clin Chem 50:1748–1754
Comai L, Henikoff S (2006) TILLING: practical single-nucleotide mutation discovery. Plant J 45:684–694
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Bush, S.M., Krysan, P.J. (2014). iTILLING: Personalized Mutation Screening. In: Sanchez-Serrano, J., Salinas, J. (eds) Arabidopsis Protocols. Methods in Molecular Biology, vol 1062. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-62703-580-4_9
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DOI: https://doi.org/10.1007/978-1-62703-580-4_9
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